A man wearing marijuana-themed sunglasses chats on a phone at the first day of Hempfest, Friday, Aug. 16, 2013, in Seattle. (AP Photo/Elaine Thompson) by Gene JohnsonAssociated Press Writer SEATTLE (AP) — Thousands streamed into a Seattle waterfront park Friday for the opening of a three-day marijuana festival — an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado last fall.